EP0580227B1 - Méthode de transmission et de réception de signaux de télévision sur paiement - Google Patents

Méthode de transmission et de réception de signaux de télévision sur paiement Download PDF

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Publication number
EP0580227B1
EP0580227B1 EP93202070A EP93202070A EP0580227B1 EP 0580227 B1 EP0580227 B1 EP 0580227B1 EP 93202070 A EP93202070 A EP 93202070A EP 93202070 A EP93202070 A EP 93202070A EP 0580227 B1 EP0580227 B1 EP 0580227B1
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EP
European Patent Office
Prior art keywords
transmission
reception
television signals
bit
publicity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93202070A
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German (de)
English (en)
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EP0580227A1 (fr
Inventor
Roberto Dini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sisvel SpA
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Sisvel SpA
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Publication of EP0580227A1 publication Critical patent/EP0580227A1/fr
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2543—Billing, e.g. for subscription services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0884—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of additional display-information, e.g. menu for programme or channel selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0887—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of programme or channel identifying signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only

Definitions

  • the present invention relates to a method for the transmission and reception of television signals.
  • the Programme Delivery Control System provides two functions:
  • the user calls a Televideo page containing the indications of television programs, and marks with a cursor the programs that are desired to be received.
  • the programs are identified by a code transmitted in the actual Televideo page, called PIL (Program Identification Label), normally coinciding with the date and time "nominal" of the transmission.
  • PIL Program Identification Label
  • the UER standard allows the broadcaster to identify the publicity insert. It is in fact possible to assign to the publicity an appropriate PIL, being different from that of the program in which it is contained and from those of the adjacent programs. The user, for recording the publicity, should explicitly request permission.
  • the first code could be used for marking the publicity insert between the two programs, while the second could be used for marking the publicity insert within a program; which causes a suspension of the recording, that then resumes upon termination of the publicity.
  • the aim of the present invention is therefore that of indicating a method of transmission and reception of television signals that allow for avoiding the recording of publicity inserts in a secure manner.
  • the present invention has as its subject a method as defined by claim 1 and an apparatus as defined by claim 16.
  • the object of the invention is a pay system that allows the user to exclude the publicity inserts from recordings; it is considered that this system can be accepted by broadcasters, inasmuch they would receive a payment.
  • the PCS is composed of 4 bit, of which the first two identify the type of sound (mono, stereo, double audio), and the other two, are in fact free.
  • bit P It is herein proposed to crypt the bit that identifies the publicity insert (that from here on shall be called bit P); in other terms the value 1 will only indicate in certain moments the presence of publicity, while in others it will have the opposite significance. Only those in possession of the decrypting "key”, that is to say only those in the knowledge of the laws with which the significance of the bit in question changes, will be able to use the service.
  • a first way of crypting the bit P could be the following.
  • a table is defined in which, for every day, the time intervals are delimited in which the bit P assumes the significance of the presence of publicity if it has the value 1. For example the day 2/3/1992, during the morning the intervals can be from 8 to 8.15, from 8.27 to 8.31, from 8.45 to 9.20, etc. It is clear that in the complementary intervals the bit has the opposite significance.
  • Cards have recently been realised having the form of a credit card, that contain a microprocessor with an annexed RAM and ROM.
  • Such cards are inserted in a slot of an appliance and, by way of electrical contacts situated on the edge, messages can be exchanged with the microprocessor of the appliance; for major details attention is drawn for instance to the article "Carte Intelligenti” by S. Cazzani, Elettronica Oggi, N. 90 of 15-11-89, pages 44-56; or also to the French patent application N. 2 641 395 and 2 646 260.
  • the card could incorporate an I.C. of the type ST16XYZ by S.G.S. Thomson, and the reader a microcontroller by Motorola, of the type 68HC05B6, the card could moreover be advantageously in line with the ISO 7816 Standard.
  • a video recorder or a television according to the invention could read appropriate cards, made commercially available, containing within their ROM the table of significances of P for the duration of an established period, for example a week.
  • the user that wishes to take advantage of the service of cancelling the publicity inserts, buys a card, inserts it in the reader of the receiver.
  • the microprocessor of the receiver communicates to that of the card the date and time (that could be deduced by the packet 8/30 format 1, or by line zero of any Televideo page, or by a clock incorporated in the receiver), and the instantaneous value of the bit P.
  • the microprocessor of the card comparing the date and time with that of the table that it has in its ROM, would return to the microprocessor of the receiver the instantaneous significance of the bit P.
  • bit P could be crypted as follows.
  • the bit P can constitute a sequence of the type 11111111111111110000000000000000111111111111....
  • This sequence can be crypted by making the EXOR (OR exclusive) with a sequence being pseudo-casual.
  • the actual pseudo-casual sequence is memorised, or its generation "key”. Obviously said pseudo-casual sequence is changed at regular intervals.
  • the given diagram is an example that refers to the case of obtaining bit P crypted from the packet 8/30 format 2 inserted in the teletext signal.
  • reference number 1 indicates the received television signal
  • reference number 2 indicates the block of the circuits for selection, amplification and detection of the signal itself, at the output of block 2 the composite video signal is present that arrives to the successive block 3, which represents a teletext signal extractor of the known type, being part of a normal teletext decoder; for example particularly adapted for the necessity could be the SAA 4700 circuit by Philips, provided in fact for the extracting and decoding of the data contained in line 16 of the video signal.
  • control unit 4 in a preferred version of the invention contains a microprocessor, of the type normally utilised in television receivers, for example of the type 8032 by Philips.
  • the control unit 4 receives from the teletext signal extractor 3 the packet 8/30 format 2, containing the third bit of the byte 14, i.e. the bit P of interest; the unit 4 also receives time and date information, contained in line zero of any teletext page.
  • Reference number 5 indicates the actual recorder, of the usual cassette type; the recorder 5 receives instructions from the control circuit 4.
  • Reference number 6 finally indicates a card reader, being of the intelligent type as previously mentioned; said reader is connected by way of a bus to the control unit 4; as mentioned the card, that the user will have introduced into the reader 6, also contains a microprocessor, which within its ROM, contains a table that supplies, for every date and time, the significance of bit P contained in the television signal.
  • the microprocessor of the unit 4 periodically communicates, for example every second, date, time and value of bit P to the microprocessor of the card contained in the reader; the microprocessor of the card compares the value of bit P in its table and supplies the significance, i.e. the decrypted value, to the microprocessor of the unit 4.
  • the unit 4 knows whether the transmission in act at that moment is or not a publicity insert and is able to communicate appropriate commands to the recorder 5, stopping it in the event of publicity and reactivating it in the case it is inoperative and there is no publicity.
  • Block 10 passes control to the successive block 11, which provides for reading in the line zero of a received teletext page the date and time; the instant in which the time changes, i.e. the second moves, it passes control to the successive block 12; block 12 provides for reading the value of bit P, and passes control to the successive block 13; block 13 provides for transmitting to the microprocessor of the card the read data (date, time value of P); control is then passed to successive block 14.
  • Block 14 provides for awaiting the reply of the microprocessor of the card; as soon as this occurs it passes control to successive block 15.
  • Block 15 is a control block, it verifies whether the decrypted value of bit P signifies that a publicity insert is taking place; in the affirmative case control is passed to block 16, in the negative case control is passed to block 17.
  • Block 16 controls as to whether the recorder is recording, and in such case it is made to stop (it is placed in PAUSE); control is then passed back to block 11.
  • Block 17 controls as to whether the recorder is inoperative, and, in the affirmative case, it restarts it; control is then passed back to block 11.
  • the receiver could be either a video recorder or a television; in this case the signal of the presence of publicity could for example command momentary skip to another established program, or the automatic selection of the teletext function, with the associated "muting".

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Human Computer Interaction (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Claims (16)

  1. Un procédé pour l'émission et la réception de signaux de télévision, dans lequel, dans le signal de télévision, lors des pauses publicitaires, on insère des informations codées en correspondance à un code secret déterminé de sorte qu'uniquement des récepteurs équipés d'un décodeur adéquat soient capables de détecter ledit code et en conséquence d'activer une ou plusieurs fonctions spécifiques, caractérisé en ce que:
    lesdites informations codées sont représentées par un bit;
    ledit bit (P) est un bit libre d'une série de bits (PCS) faisant partie d'un octet de contrôle (14);
    ledit bit (P) est crypté;
    ledit décodeur est prévu pour recevoir une carte contenant les informations relatives audit code secret.
  2. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ledit bit (P) est crypté en fonction du temps, c'est-à-dire que sa valeur 1 a une signification positive lors d'intervalles de temps prédéterminés et une signification négative pendant d'autres intervalles de temps et que sa valeur 0 a une signification opposée.
  3. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ladite carte contient un circuit intégré et une mémoire électronique.
  4. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ladite carte contient une mémoire de type magnétique.
  5. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ladite carte contient les instants pour les intervalles de temps pendant lesquels ledit bit (P) a une signification positive lorsque sa valeur est (1) et les intervalles pendant lesquels le bit (P) a une signification négative lorsque sa valeur est 1.
  6. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ledit bit (P) est émis en correspondance à une séquence de 1 et de 0, crypté par l'application d'une fonction OU exclusive avec une séquence secrète pseudo aléatoire.
  7. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 6, caractérisé en ce que ladite carte contient ladite séquence secrète pseudo aléatoire.
  8. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 2, caractérisé en ce que ledit décodeur calcule le temps à partir de la ligne zéro d'une page télétext.
  9. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 6, caractérisé en ce que ledit décodeur utilise, pour la synchronisation du début de ladite séquence de 1 et de 0, les paquets 8/30 format 1.
  10. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 3, caractérisé en ce que ladite carte contient un microprocesseur qui assure l'opération de décryptage et la communication du résultat au récepteur.
  11. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 4, caractérisé en ce que le récepteur contient un microprocesseur, assurant la lecture des informations contenues dans la carte ainsi que l'opération de décryptage.
  12. Procédé pour l'émission et la réception de signaux de télévision selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le récepteur, dès qu'il est déterminé que l'émission en cours est une pause publicitaire, permet d'arrêter une fonction d'enregistrement et de la relancer de nouveau une fois ladite pause publicitaire terminée.
  13. Procédé pour l'émission et la réception de signaux de télévision selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le récepteur, dès qu'il est déterminé que l'émission en cours est une pause publicitaire, permet d'activer le passage vers une fonction télétext, avec activation de la fonction de coupure du son; et dès que ladite pause publicitaire est terminée, assure le retour à la réception d'origine.
  14. Procédé pour l'émission et la réception de signaux de télévision selon l'une ou plusieurs des revendications 1 à 11, caractérisé en ce que le récepteur, dès qu'il est déterminé que l'émission en cours est une pause publicitaire, permet d'activer le passage à une autre chaíne de télévision déterminée par l'utilisateur; et dès que la pause publicitaire est terminée, assure le retour à la réception d'origine.
  15. Procédé pour l'émission et la réception de signaux de télévision selon la revendication 1, caractérisé en ce que ledit code secret est communiqué audit décodeur au moyen d'un support de mémoire adéquat ou par téléphone.
  16. Dispositif pour l'émission et la réception de signaux de télévision selon le procédé de la revendication 1, dans lequel sont prévus, du côté émetteur, des moyens pour insérer dans le signal de télévision, pendant les pauses publicitaires de l'information codée selon un code secret déterminé et dans lequel sont prévus du côté récepteur des moyens de recodage appropriés et qui sont capables de détecter ledit code et en conséquence d'activer une ou plusieurs fonctions spécifiques, caractérisé en ce que :
    du côté émetteurs sont prévus des moyens pour insérer dans le signal de télévision pendant les pauses publicitaires un lit crypté (P) qui représente ladite information codée et qui constitue un bit libre d'une série de bits (PCS) inclus dans un octet (14) de contrôle (14);
    et en ce que du côté récepteur lesdits moyens de décodage sont disposés à l'avance pour recevoir une carte qui contient l'information relative audit code secret.
EP93202070A 1992-07-22 1993-07-16 Méthode de transmission et de réception de signaux de télévision sur paiement Expired - Lifetime EP0580227B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO920625A IT1257390B (it) 1992-07-22 1992-07-22 Sistema per la trasmissione e ricezione di segnali televisivi a pagamento.
ITTO920625 1992-07-22

Publications (2)

Publication Number Publication Date
EP0580227A1 EP0580227A1 (fr) 1994-01-26
EP0580227B1 true EP0580227B1 (fr) 1999-10-13

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Application Number Title Priority Date Filing Date
EP93202070A Expired - Lifetime EP0580227B1 (fr) 1992-07-22 1993-07-16 Méthode de transmission et de réception de signaux de télévision sur paiement

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EP (1) EP0580227B1 (fr)
DE (1) DE69326723T2 (fr)
ES (1) ES2140434T3 (fr)
IT (1) IT1257390B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69826622T2 (de) 1997-12-26 2005-08-11 Matsushita Electric Industrial Co., Ltd., Kadoma Zur Werbungsunterdrückung nicht verwendbares System zur Identifikation von Videofilmausschnitten
DE10028623A1 (de) * 2000-06-09 2001-12-20 Clemente Spehr Übertragungsmedien-Manipulationsverfahren und -vorrichtung zur Manipulation der Effizienz eines Verfahrens zur Unterdrückung unerwünschter Übertragungsblöcke

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68927499D1 (de) * 1988-09-30 1997-01-09 Right Hemisphere Pty Ltd Fernsehprogramm-verteilungssystem
FR2646260B1 (fr) * 1989-04-19 1992-07-24 Dassault Electronique Lecteur de carte a microcircuit perfectionne

Also Published As

Publication number Publication date
IT1257390B (it) 1996-01-15
DE69326723T2 (de) 2000-03-16
EP0580227A1 (fr) 1994-01-26
ITTO920625A1 (it) 1994-01-22
DE69326723D1 (de) 1999-11-18
ES2140434T3 (es) 2000-03-01
ITTO920625A0 (it) 1992-07-22

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